含减阻剂的管输成品油质量控制综合监测方法

中石化石油化工科学研究院有限公司

成品油;减阻剂;管输;剪切;质量;综合监测

A comprehensive monitoring approach for quality control of product oil containing drag reducing agent during pipeline transmission
LIU Qian,LEI Bin,XIN Shihao,YANG He

SINOPEC Research Institute of Petroleum Processing Co. Ltd.

product oil, drag reducing agent (DRA), pipeline transmission, shearing, quality, comprehensive monitoring

DOI: 10.6047/j.issn.1000-8241.2024.04.012

备注

【目的】减阻剂在成品油管输过程中如未充分溶解或未被充分剪切,将对成品油质量造成严重影响,甚至会引起质量事故。【方法】提出测定含减阻剂成品油的外观、运动黏度、馏程及未洗胶质等特征理化指标,并通过与成品油正常项目值对比判断有无异常,从而初步判定减阻剂是否对成品油质量产生影响。采用浓缩-红外光谱法提取汽油中高分子成分的方法,并提出判定汽油中是否含有长链烷烃的分析手段。采用凝胶渗透色谱法测定汽油中高分子成分的分子量,作为判断汽油中是否存在未充分剪切的减阻剂的定性及定量方法。【结果】通过分析减阻剂在成品油中的溶解过程,建立了外观-运动黏度法作为直观的初步评价方法;探究减阻剂对管输成品油质量指标的影响,认为可将馏程/未洗胶质法作为日常质量监控的分析手段;采用浓缩-红外光谱法,可根据特征峰进一步判断有无长链烷烃;采用凝胶渗透色谱法可对成品油中高分子进行定性及定量分析,从而直接判断高分子链的剪切程度。【结论】建立了一套综合鉴定方法,可准确判断管输过程中成品油质量是否受到减阻剂添加的影响,能为预防管输成品油质量事故与保障管输成品油品质提供技术支持。(图9表7,参[26]
[Objective] Insufficient dissolution or shearing of drag reducing agents (DRAs) in product oil during pipeline transmission can have a significant impact on the oil’s quality and may even result in quality accidents. [Methods] This study initially established characteristic physical and chemical indexes, including appearance, kinematic viscosity, distillation range, and unwashed gum, for the determination of DRA-containing product oil. Subsequently, a comparison was made against normal values to detect any abnormalities, enabling preliminary judgments on the impact of DRAs on product oil. Furthermore, a method leveraging concentration-infrared spectroscopy was developed for extracting macromolecular components from gasoline, and an analytical means was established to determine the presence of long-chain alkanes in gasoline. Additionally, gel chromatography was employed to determine the molecular weight of macromolecular components in gasoline, offering a qualitative and quantitative approach to identify insufficiently sheared DRAs. [Results] The appearance-kinetic viscosity method was established as a preliminary visual evaluation technique after conducting an analysis on the dissolving process of DRAs in product oil. The distillation range/unwashed gum method was identified as suitable for routine quality control, following an investigation into the influence of DRAs on the quality indexes of product oil during pipeline transmission. Moreover, the established concentration-infrared spectroscopy method proved effective in determining the presence or absence of long-chain alkanes through characteristic peak analysis. Furthermore, the gel permeation chromatography (GPC) method was established. It offered qualitative and quantitative analysis on the macromolecules in product oil, facilitating direct judgments on the shear rate of macromolecule chains. [Conclusion] This study presents a comprehensive set of appraisal methods, enabling accurate detection of the impact of DRAs on the quality of product oil during pipeline transmission. The findings of this study offer a feasible solution for preventing quality accidents in product oil during pipeline transmission,thus enhancing the overall quality assurance of product oil transported through pipelines. (9 Figures, 7 Tables, 26 References)
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